Table 1.

Completeness and correctness of data by selected variables in the Aarhus Sarcoma Registry

Variables	Completeness of data % (95% CI), n		Correct data % (95% CI), n
	Prevalidation	Postvalidation	Prevalidation
Date of admission	81.8 (79.7–83.8)	100.0 (99.8–100.0)	43.2 (40.4–46.1)
	1180/1442	1827/1827	510/1180
Duration of symptoms	88.1 (86.3–89.7)	95.9 (94.9–96.8)	50.2 (47.4–53.0)
	1270/1442	1752/1827	638/1270
Cause of referral	81.1 (78.9–83.1)	100.0 (99.8–100.0)	93.7 (92.1–95.0)
	1169/1442	1827/1827	1095/1169
Tumor size	79.1 (76.9–81.2)	95.5 (94.4–96.4)	42.7 (39.8–45.6)
	1141/1442	1744/1827	487/1141
Anatomic localization
Bone sarcoma	77.6 (72.3–81.7)	100.0 (99.3–100.0)	94.1 (90.7–96.5)
	287/370	552/552	270/287
Soft tissue sarcoma	81.8 (79.4–84.1)	100.0 (99.7–100.0)	86.1 (83.6–88.3)
	877/1072	1275/1275	755/877
Compartmental localization	79.3 (77.1–81.3)	100.0 (99.8–100.0)	73.0 (70.3–75.5)
	1143/1442	1827/1827	834/1143
Histological subtype
Bone sarcoma	77.8 (73.3–82.0)	100.0 (99.3–100.0)	64.2 (58.4–69.8)
	288/370	552/552	185/288
Soft tissue sarcoma	81.0 (78.5–83.3)	100.0 (99.7–100.0)	79.4 (76.5–82.0)
	868/1072	1275/1275	689/868
Grade of malignancy	95.6 (94.4–96.6)	100.0 (99.8–100.0)	53.4 (50.7–56.1)
	1378/1442	1827/1827	736/1378
Surgerya
Date	68.1 (65.5–70.6)	100.0 (99.8–100.0)	25.3 (22.4–28.2)
	895/1315	1564/1564	226/895
Type	80.7 (78.4–82.8)	100.0 (99.8–100.0)	97.7 (96.7–98.5)
	1061/1315	1564/1564	1037/1061
Margin	79.9 (77.7–82.1)	99.9 (99.6–100.0)	76.0 (73.3–78.6)
	1051/1315	1563/1564	799/1051
Radiotherapyb	95.6 (94.4–96.6)	100.0 (99.8–100.0)	90.5 (88.8–92.0)
	1379/1442	1827/1827	1248/1379
Chemotherapyb	95.6 (94.4–96.6)	100.0 (99.8–100.0)	95.9 (94.8–96.9)
	1379/1442	1827/1827	1323/1379

Notes:

^aSubgroup includes only patients treated with surgery (prevalidation, n = 1315; postvalidation, n = 1564);

^bdata on whether or not the patient was treated with radiotherapy and chemotherapy.

Abbreviation: CI, confidence interval.